The House Freedom Caucus is pushing for a continuing resolution to fund the government until Dec. 30, eight days longer than the Dec. 22 resolution pushed by House leadership, to try to avoid leaders adding money to the resolution as they work on the tax legislation.

Several members singled out the deal to win the vote of Sen. Susan Collins, R-Maine, for the Senate tax bill in exchange for pushing two Obamacare stabilization bills as the reason for their concern.

The deal would make payments to Obamacare insurers for two years in exchange for more flexibility for states to waive federal insurer regulations.

The second bill gives states $10 billion to set up reinsurance programs to cover the sickest claims from Obamacare insurers, which would lead to lower premiums overall.

Some lawmakers are still nursing old wounds of battling former House Speaker John Boehner over spending bills passed before Christmas.